Internal-combustion engine



June 2, 1925. 1,539,963

- E. H. SHERBONDY INTERNAL COMBUSTION ENGINE Original Filed June 11, 1920 1111111 lllllrll/v/l llllllll j I [r111 1 If anneal as, WW M144 kit m;

" liquid fuel.

Patented June 2, 1925.

UNITED STATES PATENT OFFICE.

EARL H. SHERBONDY, OF DETROIT, MICHIGAN, ASSIGNOR TO SIDNEY D, WALDON,

' OF DETROIT, MICHIGAN.

INTERNAL-COMBUSTION ENGINE.

Application filed June 11, 1920, Serial No. 388,239.

To all whom it ma/g concern:

Be it known that I, EARL H. SHERBONDY, a citizen of the United States of America, residing at Detroit, in the county of lVayne and State of Michigan, have invented certain new and useful Improvements in Internal-Combustion Engines, of which the following is a specification, reference being had therein to the accompanying drawings.

The invention relates to internal combustion engines and has more particular reference to the means employed for quickly heating the intake when the engine is started to assist in the vaporization of the A further feature of the invention is the peculiar construction of the intake manifold, and still further, the means employed for automatically controlling the heating means as hereinafter set forth.

In the drawings:

Figure 1 is a cross section through an engine, to which my improvement is applied;

Figure 2 is a longitudinal section through the intake manifold.

A is the engine block. B is the exhaust manifold arranged on one side of the block, and C is the intake manifold, which as shown is arranged on the opposite side of the block. D is a conduit extending from the exhaust manifold B to the intake manifold C, being connected to a jacket E surrounding the intake manifold.

In the present state of the art various constructions have been devised for heating the intake by a portion of the exhaust gases. It has been found undesirable to over heat the intake, and therefore the amount of the exhaust which is used is necessarily restricted. As a consequence, when the engine is started, a certain amount of time is required for the transference of sufficient heat to the intake to secure the best running condition, as otherwise there would be an over-heating when the engine is in full operation. lVith the present invention 1 have provided-means for almost instantaneously heating the intake when the engine is started without danger of over-heating after the engine is in full operation. This is effected primarily by the arrangement of a valve or damper F in the main exhaust, which when closed will force all of the exhaust gases through the conduit 1) and into the jacket E. This valve or Renewed July 21, 1924.

damper may, if desired, be manually controlled; but preferably, it is automatically controlled and with the construction shown it is actuated by the suction of the intake manifold. Thus when the throttle G controlling the intake is in idling position, the relatively high vacuum in the intake above the throttle is used for operating a motor H for closing the damper F. This damper is, however, preferably unbalanced so that an excess of pressure acting thereon will cause it to automatically open. Also where the throttle G is opened and the vacuum in the manifold thereby reduced, this will permit the opening of the valve or damper F.

The construction of the manifold C and the jacket E surrounding the same is such as to produce the desired heating effect and at the same time provide for easily cleaning any carbon deposit from the exhaust gases. As shown in Figure 2, the manifold C is cast integral with the jacket E, which latter is in the form of a cylinder extending the entire length of the manifold and open at its opposite ends. These open ends are, however, normally closed by separate caps I secured by suitable means, such as the central bolts J, engaging a threaded aperture in a ing K upon the end of the manifold C. The manifold C is of the substantially' T-shaped form having the central stem portion L, which leads from the carburetor, and the oppositely laterally-extending portions which terminate in elbow bends M leading into the cylinder block. The points at which there is a change in direction of the current are the points where it is most desirable to concentrate the heat and this is accomplished with my construction; first, by connecting the conduit B at a point directly opposite the portion L of the intake; second, by arranging baffles or divisions at N within the jacket E, these extending longitudinally at substantially diametrically opposite points and compelling the. exhaust gases to -travel to the opposite ends of the jacket; third, by terminating the baffles N so that the exhaust gases will sweep around the elbow bends M, concentrating the heating effect thereon. The gases will then pass beneath the baffles N to the center, where they will escape through an outlet conduit 0.

With the construction.described, when the central portion,

engine is started, the damper F will be closed, and consequently, all of the exhaust gases are com elled to pass through the conduit'D into t e'jacket Here they will first impinge against the portion of the intake C which is directly opposite the portion L thereof, leading from the carburetor. Thus, any of-theliquid fuel which is thrown out from the air current against the surface of the "manifold at this point, where the di 'rection of the current changes, will come'in contactwith the heated surface and will be vaporized. Again, at the elbow-bends M, any of the liquid fuel thrown against the surface willbe vaporized and will pass as vapor into the engine. The heat which will be transferred from the exhaust is suflicient to almost instantaneously heat the manifold; but as soonaas the throttle is opened, the

valve or, damper F will also open, permitting the greater portion of the exhaust gases to escapelthrough the regular exhaust conduit.

What lclaim :as my invent-ion is:

1. 'In an internal combustion engine, the combination with an exhaust manifold, of an intake manifold comprising a central portionleading from the carburetor,.oppositely extending branch portions in alignment with each other and transverse to said a jacket surrounding said the ends of said jacket branch; portions only,

the ends of being open, and caps for closing said jacket.

2. In an internal combustion engine, the

combination with vanexhanst manifold and an intake manifold having a stem portion and-portions extending laterally therefrom,

of a'jacket enclosing the laterally extending portions only of said intake manifold, a conduit for 'conveymgexlmust gases from the exhaust manifold to said jacket, said conduit being connected to said jacket at a point-opposite to .thestem portion of said intake manifold, means for controlling the ipassageaof exhaust gases through said conduit, and an outletin said jacket at a point remote from the point of connection of the said conduit with the jacket for said exhaustgases.

13. ln aninternal combustion englne, the

combination with an exhaust manifold and tan-intake manifold having a stem portion and portions extendinglaterally therefrom,

the exhaust manifol of a jacket enclosing the laterally; extending portions only of said intake manifold, a conduit for conveyin exhaust gases from 6? to said jacket, said conduit being connected to said jacket at a point opposite to the stem portion of said of-ajacketenclosing the laterally extending portions only of said intake manifold, a conduit for conveyingexhaust gases from the exhaust manifold to said-jacket, saidv conduit being connected to saidjacket at a point opposite :to the stem portion of said intake manifold, means for controlling V the, passage of exhaust gases through said conduit, baffles Within said jacketfor directing-the exhaust gases tov the opposite ends of the laterally extending portions of said intake manifold,

asaid bafiles terminating short of the ends of said laterally extending portionsand per- ;mitting the exhaust gases to sweep around the ends of said laterally extendingiportions, andan outlet in. said jacket for said exhaust gases positioned on the opposite side of the said baflies from that of the connection between the conduit and thejacket. V

5. In an internal combustion engine,qthe combination with an exhaust manifold, of anintake manifold comprising a central, por tion leading from the carbureter, oppositely extending branch portions in alignment with each other and transverse to said central portion, a jacket surrounding said branch portion, the ends of said jacket being open, and removable caps for closing the said jacket ends.

In testimony whereof I aflix my signature.

EARL H. SHERBONDY. 

